Why do you want that Richie? I like good weight for age but being overdone gets a lot of negative comments here. I think 2 yr old bulls start to look the goods and marketable once they hit the 800kg mark, my yearling bulls that I sell at 13-15 months look the goods at 600kg, all easily done without creep feed. I think there is an art in having them at the right weight at sale time to express their characteristics without being overdone. I think you might be under the Branded influence of feed, feed, feed.
You also have to consider what that extra feed is going to cost you against any perceived higher sale price.
I do understand though that with multivendor sales it starts to be a bit of a race for the heaviest bull.
Ken